CVE-2026-119338: Out-of-bounds Read

Description

Tesseract is an open source OCR engine. From 5.4.0 until 5.5.4, AppendLinePolygon in src/api/pagerenderer.cpp destroys the caller-owned right-to-left Pta accumulator while receiving it by value, leaving line_top_rtl_pts and line_bottom_rtl_pts dangling. On an upright Hebrew or Arabic page at the default PAGE XML level, POLYGONFLAG with a false skewed_flag enters the vulnerable calls, while LEVELFLAG greater than zero provides an alternative gate. The calls repeatedly read and free the stale object, causing a double free and use after free and allowing corrupted coordinates to reach RecalcPolygonline. This issue is fixed in version 5.5.4.

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Weakness Type (CWE)

CWE-125 Out-of-bounds Read

CWE-415 CWE-415

CWE-416 Use After Free

References

Other References

https://github.com/tesseract-ocr/tesseract/commit/fa52414ff1fd13ae4b00048d2498f9141b0bc2eb https://github.com/tesseract-ocr/tesseract/pull/4647 https://github.com/tesseract-ocr/tesseract/releases/tag/5.5.4 https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-vf7v-2h4f-6f4j

Frequently Asked Questions

What is CVE-2026-119338? +

Tesseract is an open source OCR engine. From 5.4.0 until 5.5.4, AppendLinePolygon in src/api/pagerenderer.cpp destroys the caller-owned right-to-left Pta accumulator while receiving it by value, leaving line_top_rtl_pts and line_bottom_rtl_pts dangling. On an upright Hebrew or Arabic page at the default PAGE XML level, POLYGONFLAG with a false skewed_flag enters the vulnerable calls, while LEVELFLAG greater than zero provides an alternative gate. The calls repeatedly read and free the stale object, causing a double free and use after free and allowing corrupted coordinates to reach RecalcPolygonline. This issue is fixed in version 5.5.4.

How do I check if I'm vulnerable to CVE-2026-119338? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2026-119338